Avengers: Infinity War and Avengers: Endgame managed to pull the most heroic moments that the MCU has ever seen. With multiple callbacks to the first Avengers film, the movies indeed heralded the end of an era.
Throughout the screening of both movies, Thanos, the main antagonist did not use this particular Infinity Stone to his advantage. It seems that the Mind Stone was also beyond the diabolical plans of the mad Titan himself.
Thanos Did Not Use The Mind Stone Even Once
The Infinity Stones basically made the entire lore of the Infinity Saga of the Marvel Cinematic Universe. The sparks of cosmic energy left from The Big Bang gave these stones immense powers. Thanos, the mad titan himself used these stones to his advantage multiple times (including killing our beloved) but he never used the mind stone.
Thanos used the Power Stone to torture Thor and destroy the Asgard spaceship that they were traveling on (killing Loki in the process). He later collected the Space Stone to travel around and the third stone he collected was the Reality Stone. After sacrificing his daughter, Thanos collected the Soul Stone and later, the time stone from Doctor Strange.
The Josh Brolin starrer character used the time stone to make Vision alive again (after Wanda had killed him) to take the Mind stone off his head. Before snapping his fingers, Thanos did not use the mind stone a single time! Although he used the Mind Stone when he snapped his fingers he did not use it, particularly like all the others.
Thanos Used The Stones To Destroy The Stones
As the infamous line goes, Thanos indeed used the Infinity Stones to destroy the Infinity Gauntlet once and for all after half the universal population went out of existence. This ensured that no other man could achieve what the mad titan had achieved or do any worse for the universe. By destroying the Infinity Gauntlet, Thanos lost the ability to use the Mind Stone.
While snapping, Thanos used the Mind Stone, and shortly after the snap, Thanos destroyed the Infinity Gauntlet and Infinity Stones along with it thus disabling him from ever using the Mind Stone. This is a neat little detail since the usage of the Mind Stone would have made things a lot easier instead of the messy all-out war but the people indeed had a fun climax to watch at the end of the Infinity Saga.
Avengers: Infinity War and Avengers: Endgame are available to watch on Disney+.